Japanese badged sewing machine skipping stitches
I'm new to this forum. Thank for accepting me. I have a Japanese badged machine with a "keystone" badge. It's a clean machine but the bobbin winder has issues. I did finally get it to wind a bobbin. It is skipping stitches. I have cleaned everything, found a vintage class15 bobbin, and put a new universal needle in. It purrs like a kitten and will zigzag without skipping but skips on the straight. Any help would be appreciated. I tried uploading some pictures but they failed.